Comparison Of Elastic Quality Between Torn Supraspinatus Muscle And Continuous Supraspinatus Muscle Tendon

Objective:Using tissue stiffness derived from ultrasonic shear wave elastography,the elastic quality of supraspinatus tendon after rotator cuff tear was compared with that of normal tendon,and the difference in the elastic quality of supraspinatus tendon after traumatic rotator cuff tear and non-traumatic rotator cuff tear was explored.Methods:A study of 64 patients undergoing arthroscopic rotator cuff repair and suture surgery for rotator cuff injury in our hospital from July 2021 to October 2022.Patients were divided into three groups based on shoulder MRI and medical history.Group 1:Shoulders with traumatic tears of the supraspinatus muscle(33 cases;hereinafter collectively referred to as the trauma group),Group 2: Shoulders with non-traumatic tears of the supraspinatus muscle(31 cases;hereinafter collectively referred to as the non-trauma group),and Group 3: Shoulders with normal supraspinatus muscle without damage(64 cases;hereinafter collectively referred to as the normal group).Before surgery,ultrasound shear wave elastography was performed on both shoulders of the patients,and the elastic modulus(SWE)and shear wave velocity(SWV)of the bilateral supraspinatus muscle tendons in all patients were measured.The patient underwent preoperative MRI examination of the affected shoulder,and the fat infiltration grading of the affected supraspinatus muscle was performed using the Goutallier grading method(0-4 grades).Collecting patient information includes:(1)General information: age,gender,duration of pain;(2)Relevant intraoperative information: whether the long head tendon of the biceps brachii is damaged or not,and whether acromioplasty is performed;Statistical records were analyzed using SPSS27.0 statistical software for each group of variables.Results:There were significant differences among the three groups in terms of shear wave elastic modulus(SWE),shear wave velocity(SWV),supraspinatus tendon thickness,Goutallier grade of supraspinatus tendon,whether to perform acromioplasty during surgery,and whether to damage the biceps brachii tendon(P < 0.05).There was no significant difference in general data such as age and gender among the three groups(P<0.05).There was a statistically significant difference in the overall distribution of pain time between the trauma group and the non trauma group(Z=-4.692,P<0.001).Patients in the trauma group had longer pain times.There was a statistically significant difference in the shear wave velocity(SWV)of the supraspinatus tendon between the traumatic and non traumatic groups(adjusted P =0.048),whether acromioplasty was performed during the operation(X2=60.121,P =0.001),and whether there was a concomitant injury to the long head of the biceps brachii tendon(X 2=4.4545,P < 0.05),while there was no statistically significant difference in the thickness of the supraspinatus tendon between the traumatic and non traumatic groups(P =0.389,P<0.05).Conclusion:1.The hardness of supraspinatus tendon tissue after rotator cuff tear is higher than that of uninjured tendon,and the hardness of supraspinatus tendon tissue after non traumatic rotator cuff tear is higher than that of traumatic torn tendon.2.Patients with traumatic rotator cuff tears have a higher rate of injury to the long head tendon of the biceps brachii muscle than patients with traumatic rotator cuff tears,while non-traumatic patients have a higher rate of acromioplasty than traumatic patients.In general,the elastic quality of the supraspinatus tendon after tearing deteriorates,and the quality of the supraspinatus tendon in patients with non-traumatic rotator cuff tears is worse than that in patients with traumatic rotator cuff tears.For patients with non-traumatic rotator cuff tears,individualized programs should be designed based on preoperative evaluation,surgical method selection,and patient postoperative rehabilitation to better promote patient healing.